Tektronix 5110, Инструкция по эксплуатации

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Adjustment-5110
c. Set the time-base unit Seconds/Div switch to an
amplifier position or for the slowest sweep rate.
d. Turn the INTENSITY control slowly clockwise and
check for a visible spot display. Note that the spot appears
when the control is between its 10 and 11 o’clock position.
If the spot appears when the control is within the given
position, proceed with step 7a.
e. Set the INTENSITY control to its 10 o'clock position.
f. _ Adjust—Intensity Range R245, using an insulated
screwdriver, for a very dim spot display. See Fig. 3-3 for
adjustment location.
7. Adjust Astigmatism
a. Set the INTENSITY control for a spot display at
normal viewing level.
b. Turn the FOCUS control through its range.
c. Check— for a spot display that is nearly round in
shape when defocused, and well
defined when focused.
d. Adjust—Astig R286 and FOCUS control together,
using an insulated screwdriver, to obtain the best defini­
tion round-spot display. See Fig. 3-3 for adjustment
location.
8. Adjust Trace Alignment
a. Set the time-base unit for a sweep rate of 1
millisecond/division.
b. Set the INTENSITY control for a trace of normal
brightness.
c. Position the horizontal trace over the center
horizontal graticule line.
d. Check—thatthe trace is parallel tothe graticule line.
e. Adjust—the TRACE ROTATION control (rear-panel
screwdriver adjustment) to align the trace horizontally.
9. Adjust Geometry
a. Press the POWER switch to turn off the os­
cilloscope.
b. Interchange the amplifier and time-base units in
their respective compartments. Pull the POWER switch to
on.
c. Position the vertical trace over the center vertical
graticule line, extending vertically above and below the
graticule area, and set the FOCUS and INTENSITY
controls for a well-defined trace, if necessary.
d. Check —that vertical bowing and tilt of the trace
display is less than 0.1 division at the center line and when
positioned horizontally across the entire graticule area.
e. Adjust—Geom R285 for minimum bowing and tilt of
the trace display at the left and right edges of the graticule.
Adjustment may have to be compromised to obtain less
than 0.1 division bowing and tilt everywhere within the
graticule area. See Fig. 3-3 for adjustment location.
f. Press the POWER switch to turn offtheoscilloscope
and interchange the amplifier and time-base units back to
their usual compartments.
g. Pull the POWER switch to on and check that
horizontal bowing and tilt of the trace display is less than
0.1 division at the center line and when positioned
vertically across the entire graticule area.
Set the equipment controls as follows:
AMPLIFIER PLUG-IN
Display
Position
Volts/Div
Volts/Div Cal
Input Coupling
On
Centered
1
Fully
clockwise
de
TIME-BASE PLUG-IN
Position
Seconds/Div
Seconds/Div Cal
Swp
Mag
Triggering
Triggering Source
Centered
1
ms
Fully clockwise
Off
+
Slope, Auto Trig,
ac Coupl
Composite
10. Adjust Vertical Gain
a. Connect a 5-volt, 1-kilohertz square-wave signal of
standardized amplitude from the calibration generator to
the amplifier input, using a 42-inch coaxial cable.
NOTE
Use an amplifier plug-in known to be accurately
calibrated, or verify correct calibration by applying a
known signal and measuring the differential output
at pins A7 and B7 of the plug-in connector. The
deflection factor at the output is 50 millivolts/divi-
sion.
3-5